EUVD-2025-3044

Comprehensive Technical Analysis of EUVD-2025-3044

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-3044 pertains to a stack overflow in RE11S v1.11, specifically within the selSSID parameter of the formWlSiteSurvey function. The Common Vulnerability Scoring System (CVSS) v3.1 base score of 9.8 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV:N): Network, meaning the vulnerability is exploitable remotely over the network.
• Attack Complexity (AC:L): Low, indicating that the attack does not require specialized conditions or extensive knowledge.
• Privileges Required (PR:N): None, meaning no privileges are required to exploit the vulnerability.
• User Interaction (UI:N): None, indicating that no user interaction is required for the attack to succeed.
• Scope (S:U): Unchanged, meaning the vulnerability does not affect resources beyond the security scope managed by the security authority.
• Confidentiality (C:H): High impact on confidentiality.
• Integrity (I:H): High impact on integrity.
• Availability (A:H): High impact on availability.

Given these metrics, the vulnerability poses a significant risk to systems running RE11S v1.11, as it can be exploited to compromise confidentiality, integrity, and availability with minimal effort.

2. Potential Attack Vectors and Exploitation Methods

The stack overflow vulnerability in the selSSID parameter can be exploited through several attack vectors:

• Remote Code Execution (RCE): An attacker could send a specially crafted request to the formWlSiteSurvey function, causing a stack overflow and potentially allowing the execution of arbitrary code.
• Denial of Service (DoS): By exploiting the stack overflow, an attacker could crash the application or the system, leading to a denial of service.
• Data Corruption: The stack overflow could lead to corruption of data, affecting the integrity of the system.

Exploitation methods may include:

• Crafted HTTP Requests: Sending malformed HTTP requests to the vulnerable endpoint.
• Buffer Overflow Techniques: Using techniques to overwrite the stack and inject malicious code.

3. Affected Systems and Software Versions

The vulnerability specifically affects RE11S v1.11. Any system or device running this version of the software is at risk. This includes:

• Network Devices: Routers, access points, and other network devices using RE11S v1.11.
• Embedded Systems: Any embedded systems that incorporate RE11S v1.11 for wireless site surveys.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Patch Management: Immediately apply any available patches or updates from the vendor to upgrade to a non-vulnerable version of RE11S.
• Network Segmentation: Isolate affected devices on separate network segments to limit the potential impact of an exploit.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity that may indicate an attempt to exploit this vulnerability.
• Firewall Rules: Implement strict firewall rules to restrict access to the vulnerable endpoint.
• Input Validation: Ensure that all input to the formWlSiteSurvey function is properly validated and sanitized.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability in RE11S v1.11 poses a significant threat to the European cybersecurity landscape, particularly for organizations and individuals relying on network devices and embedded systems. The critical nature of the vulnerability means that successful exploitation could lead to widespread disruption and potential data breaches. Organizations must prioritize patching and implementing robust security measures to protect against such threats.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerable Function: formWlSiteSurvey
• Vulnerable Parameter: selSSID
• Exploitation: The stack overflow occurs due to insufficient bounds checking on the selSSID parameter, allowing an attacker to overwrite adjacent memory.
• Detection: Monitor network traffic for unusual patterns or payloads targeting the formWlSiteSurvey function.
• Mitigation: Implement stack canaries, address space layout randomization (ASLR), and other memory protection mechanisms to mitigate the risk of stack overflow exploits.

Conclusion

EUVD-2025-3044 highlights a critical stack overflow vulnerability in RE11S v1.11 that poses significant risks to affected systems. Immediate action, including patching and implementing robust security measures, is essential to mitigate the threat. Organizations should prioritize the security of their network devices and embedded systems to safeguard against potential exploitation.

References

• Edimax Official Website
• RE11S Official Website
• GitHub Repository

This analysis provides a comprehensive overview for cybersecurity professionals to understand and address the vulnerability effectively.